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Factors affecting Reduction of Slippage in Posterolateral Fusion for Spondylolytic Spondylolisthesis / 대한척추외과학회지
Journal of Korean Society of Spine Surgery ; : 177-183, 2006.
Artículo en Coreano | WPRIM | ID: wpr-152052
ABSTRACT
STUDY

DESIGN:

A retrospective study.

OBJECTIVES:

The purpose of this study was to analyze the reduction of spondylolisthesis after postural reduction and pedicle screw instrumentation for low-grade spondylolytic spondylolisthesis, and to determine the factors affecting reduction. MATERIALS AND

METHODS:

Twenty patients (mean age 52.5 years old; range, 30-71 years old), who underwent pedicle screw instrumentation and posterolateral fusion after wide laminectomy and facetectomy, were reviewed. The minimum follow-up period was 2 years. The percentage of slippage was measured on lateral radiographs by the Taillard method. We measured the slip angle, sacral inclination, lumbar lordosis, disc height, and angulation and translation on flexion-extension stress views. These radiological parameters were analyzed statistically for correlation with the reduction of slippage.

RESULTS:

In these passive reduction surgeries, no forceful reduction was attempted. The average percentage of slippage was 20.6% preoperatively, 13.0% after instrumentation, and 19.5% at the last visit. The reduction of slippage had a correlation with hypermobile angulation on flexion-extension radiographs (p=0.02). There were no significant correlations between the amount of reduction and translation on flexion-extension radiographs (P=0.99), slip angle (P=0.79), disc space height (P=0.6), lumbar lordosis (P=0.68), and sacral inclination (P=0.35).

CONCLUSION:

Loss of reduction that was achieved by postural reduction with pedicle screw instrumentation for spondylolytic spondylolisthesis occurred at the final follow-up. There was a negative correlation between the reduction of slippage and hypermobile angulation on flexion-extension dynamic radiographs.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Espondilolistesis / Estudios Retrospectivos / Estudios de Seguimiento / Laminectomía / Lordosis Tipo de estudio: Estudio observacional / Estudio pronóstico Límite: Animales / Humanos Idioma: Coreano Revista: Journal of Korean Society of Spine Surgery Año: 2006 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Espondilolistesis / Estudios Retrospectivos / Estudios de Seguimiento / Laminectomía / Lordosis Tipo de estudio: Estudio observacional / Estudio pronóstico Límite: Animales / Humanos Idioma: Coreano Revista: Journal of Korean Society of Spine Surgery Año: 2006 Tipo del documento: Artículo